<template>
  <div class="app-container">
    <h2 style="text-align: center;">发布新课程</h2>
    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="最终发布"/>
    </el-steps>
      <el-button type="text" @click="openChapterDialog()">添加章节</el-button>
      <!-- 章节 -->
    <ul class="chanpterList">
      <li
          v-for="chapter in chapterVideoList"
          :key="chapter.id">
          <p>
              {{ chapter.title }}
              
              <span class="acts">
                <el-button style="" type="text" @click="openVideo(chapter.id)">添加小节</el-button>
                <el-button style="" type="text" @click="openEditChapter(chapter.id)">编辑</el-button>
                <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
            </span>
          </p>
          <!-- 视频 -->
          <ul class="chanpterList videoList">
              <li
                  v-for="video in chapter.children"
                  :key="video.id">
                  <p>{{ video.title }}
                    <span class="acts">
                      <el-button style="" type="text" @click="openEditVideo(video.id)">编辑</el-button>
                      <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
                    </span>
                  </p>
              </li>
          </ul>
      </li>
    </ul>

    <div>
        <el-button @click="previous">上一步</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
    </div>
    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
        <el-form :model="chapter" label-width="120px">
            <el-form-item label="章节标题">
                <el-input v-model="chapter.title"/>
            </el-form-item>
            <el-form-item label="章节排序">
                <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
            </el-form-item>
        </el-form>
        <div slot="footer" class="dialog-footer">
            <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
            <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
        </div>
    </el-dialog>

    <!-- 添加和修改课时表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
      <el-form :model="video" label-width="120px">
        <el-form-item label="课时标题">
          <el-input v-model="video.title"/>
        </el-form-item>
        <el-form-item label="课时排序">
          <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
        </el-form-item>
        <el-form-item label="是否免费">
          <el-radio-group v-model="video.free">
            <el-radio :label="true">免费</el-radio>
            <el-radio :label="false">默认</el-radio>
          </el-radio-group>
        </el-form-item>
        <el-form-item label="上传视频">
            <el-upload
                  :on-success="handleVodUploadSuccess"
                  :on-remove="handleVodRemove"
                  :before-remove="beforeVodRemove"
                  :on-exceed="handleUploadExceed"
                  :file-list="fileList"
                  :action="BASE_API+'/eduvod/video/uploadAlyideo'"
                  :limit="1"
                  class="upload-demo">
            <el-button size="small" type="primary">上传视频</el-button>
            <el-tooltip placement="right-end">
                <div slot="content">最大支持1G，<br>
                    支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                    GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                    MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                    SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
                <i class="el-icon-question"/>
            </el-tooltip>
            </el-upload>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
        <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
      </div>
    </el-dialog>
  </div>

</template>
<script>
import chapter from '@/api/edu/chapter'
import video from '@/api/edu/video'
export default {
    data() {
        return {
            
            saveBtnDisabled: false, // 保存按钮是否禁用
            saveVideoBtnDisabled: false,
            courseId: '',//课程id
            chapterVideoList: [],
            chapter: {//封装章节数据
              title: '',
              sort: 0
            },
            video: {
                title: '',
                sort: 0,
                free: 0,
                videoSourceId: '',
                videoOriginalName: ''//视频名称
            },
            dialogChapterFormVisible: false,//章节弹窗
            dialogVideoFormVisible: false,//小节弹窗
            BASE_API: process.env.BASE_API, //接口API地址
            fileList: [] //上传文件列表
        }
    },
    created() {
       //获取路由id值
       if(this.$route.params && this.$route.params.id) {
            this.courseId = this.$route.params.id;
             //根据课程id查询章节和小节
            this.getChapterVideo();
       }
    },
    methods: {
        //点击确定调用的方法
        handleVodRemove() {
          //调用接口的删除视频的方法
          video.deleteAliyunVod(this.video.videoSourceId)
                .then(response => {
                  //提示信息
                  this.$message({
                    type: "success",
                    message: "删除视频成功"
                  });
                  //把文件列表清空
                  this.fileList = []
                  //把video视频id和视频名称值清空
                  //上传视频id赋值
                  this.video.videoSourceId = '';
                  //上传视频名称赋值
                  this.video.videoOriginalName = '';
                })
        },
        //点击x调用这个方法
        beforeVodRemove(file,fileList) {
            return this.$confirm(`确定移除 ${ file.name }？`);
        },
       //上传视频成功调用的方法
       handleVodUploadSuccess(response, file, fileList) {
         //上传视频id赋值
         this.video.videoSourceId = response.data.videoId;
         //上传视频名称赋值
         this.video.videoOriginalName = file.name;
       },
       handleUploadExceed() {
            this.$message.warning('想要重新上传视频，请先删除已上传的视频')
        },

      //=======================小节操作============================
      openEditVideo(id) {
          this.dialogVideoFormVisible = true;
          video.getVideo(id)
            .then(response => {
              this.video = response.data.eduVideo;
            })
      },
      //添加小节弹框的方法
      openVideo(chapterId) {
          this.video = {}
          //弹框
          this.dialogVideoFormVisible = true;
          //设置章节id
          this.video.chapterId = chapterId;
      },
      addVideo() {
        //设置课程Id
        this.video.courseId = this.courseId;
        video.addVideo(this.video)
          .then(response => {
            //关闭弹窗
            this.dialogVideoFormVisible = false;
            //提示
            this.$message({
              type: 'success',
              message: '添加小节成功'
            })
          });
          //刷新页面
          this.getChapterVideo();
      },
      updateVideo() {
        video.updateVideo(this.video)
          .then(response => {
            //关闭弹窗
            this.dialogVideoFormVisible = false;
            //提示
            this.$message({
              type: 'success',
              message: '修改小节成功'
            })
          });
          //刷新页面
          this.getChapterVideo();
      },
      removeVideo(id) {
        this.$confirm('此操作将删除该小节, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }).then(() => {  //点击确定，执行then方法
            //调用删除的方法
            video.deleteVideo(id)
            .then(response=> {
            //提示信息
            this.$message({ //删除成功
            type: 'success',
            message: '删除小节成功'
            });
            //刷新页面
            this.getChapterVideo();
            })
        });
      },
      saveOrUpdateVideo() {
        if(!this.video.courseId) {
          this.addVideo();
          console.log('添加方法')
        } else {
          this.updateVideo();
        }
      },
      //=======================章节操作============================
      //删除记录
      removeChapter(chapterId) {
        this.$confirm('此操作将删除该章节, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }).then(() => {  //点击确定，执行then方法
            //调用删除的方法
            chapter.deleteChapter(chapterId)
            .then(response=> { 
            //提示信息
            this.$message({ //删除成功
            type: 'success',
            message: '删除章节成功'
            });
            //刷新页面
            this.getChapterVideo();
            })
        });
      },
      //修改章节弹框数据回显
      openEditChapter(chapterId) {
        //弹框
        this.dialogChapterFormVisible = true;
        chapter.getChapter(chapterId)
          .then(response => {
           this.chapter = response.data.chapter;
          })
      },

      //弹出添加章节页面
      openChapterDialog() {
          this.dialogChapterFormVisible = true;
          //表单清空
          this.chapter.title = ''
          this.chapter.sort = 0
      },
      //根据课程id查询章节和小节
      getChapterVideo() {
        chapter.getAllChapterVideo(this.courseId)
          .then(response => {
           this.chapterVideoList = response.data.allChapterVideo;
          })
      },
        previous(){
             this.$router.push({path: '/course/info/' + this.courseId});
        },
        next() {
            this.$router.push({path: '/course/publish/' + this.courseId});
        },
        addChapter() {
          //设置课程id到chapter对象
          this.chapter.courseId = this.courseId;
            chapter.addChapter(this.chapter)
                .then(response => {
                  //关闭弹框
                  this.dialogChapterFormVisible = false;
                  //提示信息
                  this.$message({
                      type: "success",
                      message: "添加章节成功"
                  });
                  //刷新页面
                  this.getChapterVideo();
                })
        },

      updateChapter() {
          chapter.updateChapter(this.chapter)
          .then(response => {
            //关闭弹框
            this.dialogChapterFormVisible = false;
            //提示信息
            this.$message({
                type: "success",
                message: "修改章节成功"
            });
            //刷新页面
            this.getChapterVideo();
          })
      },
      saveOrUpdate() {
        if(!this.chapter.id) {
          this.addChapter();
        } else {
          this.updateChapter();
        }
      }
    }

}
</script>
<style scoped>
  .chanpterList{
      position: relative;
      list-style: none;
      margin: 0;
      padding: 0;
  }
  .chanpterList li{
    position: relative;
  }
  .chanpterList p{
    /* float: left; */
    font-size: 20px;
    margin: 10px 0;
    padding: 10px;
    height: 70px;
    line-height: 50px;
    width: 100%;
    border: 1px solid #DDD;
  }
  .chanpterList .acts {
      float: right;
      font-size: 14px;
  }
  .videoList{
    padding-left: 50px;
  }
  .videoList p{
    float: left;
    font-size: 14px;
    margin: 10px 0;
    padding: 10px;
    height: 50px;
    line-height: 30px;
    width: 100%;
    border: 1px dotted #DDD;
  }
</style>